package com.atguigu.gulimail.auth.controller;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnum;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberRespVo;
import com.atguigu.gulimail.auth.feign.MemberFeignService;
import com.atguigu.gulimail.auth.feign.ThirdPartFeignService;
import com.atguigu.gulimail.auth.utils.HttpUtils;
import com.atguigu.gulimail.auth.vo.GiteeAccessToken;
import com.atguigu.gulimail.auth.vo.UserLoginVo;
import com.atguigu.gulimail.auth.vo.UserRegistryVo;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.apache.http.HttpResponse;
import org.apache.http.util.EntityUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
@Slf4j
public class LoginController {

    @Autowired
    private ThirdPartFeignService thirdPartFeignService;

    @Autowired
    private StringRedisTemplate redisTemplate;

    @Autowired
    private MemberFeignService memberFeignService;

    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone) {
        // TODO 1 接口防刷
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 60000) {
                // 60秒内不能再发
                return R.error(BizCodeEnum.VAILD_SMS_CODE_EXCEPTION.getCode(), BizCodeEnum.VAILD_SMS_CODE_EXCEPTION.getMessage());
            }
        }
        // 2 验证码的再次校验
        String codeForSend = UUID.randomUUID().toString().substring(0, 5);
        String codeForRedis = codeForSend + "_" + System.currentTimeMillis();
        // redis缓存验证码，防止同一个phone在60s内再次发送验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone, codeForRedis, 10, TimeUnit.MINUTES);
        thirdPartFeignService.sendCode(phone, codeForSend);
        return R.ok();
    }

    /**
     * // TODO 重定向携带数据， 利用session原理，将数据放在session中
     * 只要跳到下一个页面去除这个数据以后，session里面的数据就会删掉
     * <p>
     * // TODO 分布式下的session问题
     * RedirectAttributes redirectAttributes：模拟重定向携带数据
     *
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/registry")
    public String registry(@Valid UserRegistryVo vo, BindingResult result, RedirectAttributes redirectAttributes) {

        if (result.hasErrors()) {
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
            redirectAttributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.gulimail.com/reg.html";
        }

        // 真正注册 调用远程服务进行注册
        // 校验验证码
        String code = vo.getCode();

        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)) {
            if (code.equals(s.split("_")[0])) {
                // 删除验证码 令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                // 验证通过 调用远程服务进行注册
                R r = memberFeignService.registry(vo);
                if (r.getCode() == 0) {
                    // 成功
                    return "redirect:http://auth.gulimail.com/login.html";
                } else {
                    // 失败
                    Map<String, String> errors = new HashMap<>();
                    errors.put("msg", r.getData("msg", new TypeReference<String>() {
                    }));
                    redirectAttributes.addFlashAttribute("errors", errors);
                    return "redirect:http://auth.gulimail.com/reg.html";
                }
            } else {
                Map<String, String> errors = new HashMap<>();
                errors.put("code", "验证码错误");
                redirectAttributes.addFlashAttribute("errors", errors);
                return "redirect:http://auth.gulimail.com/reg.html";
            }
        } else {
            Map<String, String> errors = new HashMap<>();
            errors.put("code", "验证码错误");
            redirectAttributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.gulimail.com/reg.html";
        }

    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session) {
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute == null) {
            return "login";
        } else {
            return "redirect:http://gulimail.com";
        }
    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session) {

        R login = memberFeignService.login(vo);

        if (login.getCode() == 0) {
            // 成功
            MemberRespVo data = login.getData(new TypeReference<MemberRespVo>() {
            });
            session.setAttribute(AuthServerConstant.LOGIN_USER, data);
            return "redirect:http://gulimail.com";
        } else {
            Map<String, String> errors = new HashMap<>();
            errors.put("msg", login.getData("msg", new TypeReference<String>() {
            }));
            redirectAttributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.gulimail.com/login.html";
        }
    }

    @GetMapping("/oauth/gitee/success")
    public String gitee(@RequestParam("code") String code, HttpSession session) throws Exception {
        Map<String, String> header = new HashMap<>();
        Map<String, String> query = new HashMap<>();
        Map<String, String> map = new HashMap<>();
        map.put("client_id", "f69756f3f9333f6a1e71d263934af59ebd32a47d3a932bf46b13a53ded75d0a8");
        map.put("client_secret", "146ed52dd6c629f830b3d86b02c0d509c77f3f75cd06106e6800d333a8b877a3");
        map.put("grant_type", "authorization_code");
        map.put("redirect_uri", "http://auth.gulimail.com/oauth/gitee/success");
        map.put("code", code);
        HttpResponse response = HttpUtils.doPost("https://gitee.com", "/oauth/token", "post", header, query, map);
        if (response.getStatusLine().getStatusCode() == 200) {
            String json = EntityUtils.toString(response.getEntity());
            GiteeAccessToken socialUser = JSON.parseObject(json, GiteeAccessToken.class);
            // TODO 当前用户如果是第一次进网站，自动注册进来(为当前社交用户生成一个会员信息账号，以后这个社交账号就对应指定的会员)
            R r = memberFeignService.oauthLogin(socialUser);
            if (r.getCode() == 0) {
                MemberRespVo data = r.getData("data", new TypeReference<MemberRespVo>() {
                });
                log.info("登陆成功，用户:{}", data.toString());
                session.setAttribute(AuthServerConstant.LOGIN_USER, data);
                return "redirect:http://gulimail.com";
            } else {
                return "redirect:http://auth.gulimail.com/login.html";
            }
        } else {
            return "redirect:http://auth.gulimail.com/login.html";
        }
    }

}
